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Mks Inc
(MKSI US)
$215.65
-5.85
2.64%
Ext:
$207.20
-8.45
3.92%
(Market Closed ยท 00:55:06 UTC)
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Doc Search
Profile
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SEC Filings
Financials
Charting
Short Interest
Employees
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Annotations
Files
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API
MCP
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Privacy policy
Get the full experience
We save the real magic for signed-in users.
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Home
Stock Screener
Document Search
Charting
Watchlists
Recent Filings
Mks Inc
(MKSI US)
$215.65
-5.85
2.64%
Ext:
$207.20
-8.45
3.92%
(Market Closed ยท 00:55:06 UTC)
Follow
Doc Search
Profile
Entity Structure
SEC Filings
Financials
Charting
Short Interest
Employees
MKSI US
โ
Ask AI
MKSI US
โ
Ask AI
SEC Filings
SEC Filings
Select Filings
Financials
(111)
Expand
10-Q
Q3
ended 30 Sept 2026
5 Nov
10-Q
Q2
ended 30 Jun 2026
6 Aug
10-Q
Q1
ended 31 Mar 2026
7 May
10-K
FY 2025
ended 31 Dec 2025
24 Feb
10-Q
Q3
ended 30 Sept 2025
6 Nov 2025
10-Q
Q2
ended 30 Jun 2025
7 Aug 2025
10-Q
Q1
ended 31 Mar 2025
8 May 2025
10-K
FY 2024
ended 31 Dec 2024
25 Feb 2025
10-Q
Q3
ended 30 Sept 2024
7 Nov 2024
10-Q
Q2
ended 30 Jun 2024
8 Aug 2024
10-Q
Q1
ended 31 Mar 2024
9 May 2024
10-K
FY 2023
ended 31 Dec 2023
27 Feb 2024
10-Q
Q3
ended 30 Sept 2023
8 Nov 2023
10-Q
Q2
ended 30 Jun 2023
4 Aug 2023
10-Q
Q1
ended 31 Mar 2023
5 May 2023
Events
(240)
Expand
8-K
Results of Operations and Financial Condition
4 Nov
8-K
Other Events
19 Oct
8-K
Results of Operations and Financial Condition
5 Aug
8-K
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
12 May
8-K
Results of Operations and Financial Condition
6 May
8-K
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
6 Apr
8-K
Results of Operations and Financial Condition
17 Feb
8-K
MKS Announces Closing of Private Offering of โฌ1 Billion of 4.250% Senior Notes and Refinancing of Term Loan Facility
5 Feb
8-K
MKS Announces Proposed Private Offering of
28 Jan
8-K
Results of Operations and Financial Condition
21 Jan
8-K
Results of Operations and Financial Condition
5 Nov 2025
8-K
Results of Operations and Financial Condition
6 Aug 2025
8-K
Material Modification to Security Holders' Rights
15 May 2025
8-K
Results of Operations and Financial Condition
7 May 2025
8-K
Results of Operations and Financial Condition
12 Feb 2025
Insider Ownership
(1.7K)
Expand
Form 4
Lee John Tseng-Chung
3 Nov
Form 4
Mora Elizabeth
2 Sep
Form 4
Donlan Renee Martel
18 Aug
Form 4
Lee John Tseng-Chung
17 Aug
Form 4
Williams John Edward
4 Aug
Form 4
Schreiner James Alan
16 Jun
Form 4
Schreiner James Alan
11 Jun
Form 4
McCarthy Michelle M
8 Jun
Form 3
Donlan Renee Martel
4 Jun
Form 4
Henry David Philip
2 Jun
Form 4
Mora Elizabeth
2 Jun
Form 4
Donahue Joseph B
28 May
Form 4
COLELLA GERALD G
28 May
Form 4
Henry David Philip
27 May
Form 4
Mayampurath Ramakumar
26 May
Beneficial Ownership
(160)
Expand
SC 13G/A
MKS INC
10 Nov
SC 13G/A
MKS INC
3 Sep
SC 13G/A
MKS INC
24 Jul
SC 13G
MKS INC
16 Jul
SC 13G/A
MKS INC
6 May
SC 13G
MKS INC
30 Apr
SC 13G
MKS INC
29 Apr
SC 13G/A
MKS INC
27 Mar
SC 13G/A
MKS INC
17 Feb
SC 13G
MKS INC
12 Feb
SC 13G/A
MKS INC
31 Oct 2025
SC 13G/A
MKS INC
17 Oct 2025
SC 13G/A
MKS INC
14 Aug 2025
SC 13G
MKS INC
8 Aug 2025
SC 13G/A
MKS INC
8 Aug 2025
Other Ownership
(77)
Expand
Form 144
Lee John Tseng-Chung
13 Nov
Form 144
Mora Elizabeth
1 Sep
Form 144
Lee John Tseng-Chung
14 Aug
Form 144
Williams John Edward
3 Aug
Form 144
Schreiner James Alan
12 Jun
Form 144
Schreiner James Alan
10 Jun
Form 144
McCarthy Michelle M
5 Jun
Form 144
Henry David Philip
1 Jun
Form 144
Mora Elizabeth
1 Jun
Form 144
Donahue Joseph B
27 May
Form 144
COLELLA GERALD G
27 May
Form 144
Henry David Philip
26 May
Form 144
Lee John Tseng-Chung
22 May
Form 144
Mayampurath Ramakumar
22 May
Form 144
CANNONE PETER III
18 May
Proxies
(70)
Expand
ARS
Annual report to security holders
31 Mar
DEFA14A
Definitive additional materials
31 Mar
DEF 14A
Definitive proxy statement
31 Mar
PRE 14A
Preliminary proxy statement
20 Mar
DEFA14A
Definitive additional materials
1 Apr 2025
ARS
Annual report to security holders
1 Apr 2025
DEF 14A
Definitive proxy statement
1 Apr 2025
PRE 14A
Preliminary proxy statement
21 Mar 2025
DEFA14A
Definitive additional materials
27 Mar 2024
DEF 14A
Definitive proxy statement
27 Mar 2024
ARS
Annual report to security holders
27 Mar 2024
DEF 14A
Definitive proxy statement
5 Apr 2023
DEFA14A
Definitive additional materials
5 Apr 2023
ARS
Annual report to security holders
5 Apr 2023
DEF 14A
Definitive proxy statement
31 Mar 2022
Registrations
(54)
Expand
S-8
Registration statement (employee benefit plan)
11 May
POS AM
Post-effective amendment (unspecified)
21 Feb 2024
424B7
Prospectus filing (Rule 424(b)(7))
5 Jun 2023
424B7
Prospectus filing (Rule 424(b)(7))
1 Jun 2023
S-3ASR
Automatic shelf registration statement (S-3)
24 Aug 2022
S-8
Registration statement (employee benefit plan)
10 May 2022
Form 425
Business combination communication
8 Mar 2021
Form 425
Business combination communication
17 Feb 2021
Form 425
Business combination communication
16 Feb 2021
Form 425
Business combination communication
8 Feb 2021
S-8
Registration statement (employee benefit plan)
1 Feb 2019
S-8
Registration statement (employee benefit plan)
29 Apr 2016
S-8
Registration statement (employee benefit plan)
7 May 2014
S-8
MKS INSTRUMENTS, INC.
10 Aug 2009
S-8
MKS INSTRUMENTS, INC.
5 Aug 2005
Filing Review Correspondence
(5)
Expand
CORRESP
Filing review correspondence
28 Apr 2017
CORRESP
Filing review correspondence
19 Jun 2012
CORRESP
Filing review correspondence
30 Apr 2012
CORRESP
Filing review correspondence
24 Feb 2012
CORRESP
Filing review correspondence
18 Jan 2012
SEC Orders And Notices
(23)
Expand
EFFECT
Notice of effectiveness
29 Feb 2024
CT ORDER
Confidential treatment order
5 Jan 2017
CT ORDER
Confidential treatment order
5 Jan 2017
CT ORDER
Confidential treatment order
5 Jan 2017
CT ORDER
Confidential treatment order
18 Mar 2016
CT ORDER
Confidential treatment order
2 Sep 2015
CT ORDER
Confidential treatment order
2 Sep 2015
CT ORDER
Confidential treatment order
20 Mar 2015
CT ORDER
Confidential treatment order
19 Dec 2014
CT ORDER
Confidential treatment order
17 Sep 2014
CT ORDER
Confidential treatment order
9 Jun 2014
CT ORDER
Confidential treatment order
9 Jun 2014
CT ORDER
Confidential treatment order
9 Dec 2013
CT ORDER
Confidential treatment order
27 Mar 2013
CT ORDER
Confidential treatment order
18 Jan 2013
Tender Offers And Going Private
(6)
Expand
SC TO-I/A
Tender offer statement (issuer, amendment)
1 Sep 2009
SC TO-I/A
Tender offer statement (issuer, amendment)
28 Aug 2009
SC TO-I/A
MKS INSTRUMENTS, INC.
20 Aug 2009
SC TO-I/A
MKS INSTRUMENTS, INC.
17 Aug 2009
SC TO-I/A
MKS INSTRUMENTS, INC.
12 Aug 2009
SC TO-I
Tender offer statement (issuer)
3 Aug 2009
Other
(14)
Expand
SD
SD
28 May
SD
SD
29 May 2025
SD
SD
23 May 2024
SD
SD
25 May 2023
SD
SD
26 May 2022
SD
SD
27 May 2021
SD
SD
29 May 2020
SD
SD
30 May 2019
SD
SD
30 May 2018
SD
SD
30 May 2017
SD
SD
31 May 2016
SD
SD
1 Jun 2015
SD
SD
2 Jun 2014
10-K405
MKS INSTRUMENTS INC.
2 Apr 2001
Select Filings
Financials
(111)
Expand
10-Q
Q3
ended 30 Sept 2026
5 Nov
10-Q
Q2
ended 30 Jun 2026
6 Aug
10-Q
Q1
ended 31 Mar 2026
7 May
10-K
FY 2025
ended 31 Dec 2025
24 Feb
10-Q
Q3
ended 30 Sept 2025
6 Nov 2025
10-Q
Q2
ended 30 Jun 2025
7 Aug 2025
10-Q
Q1
ended 31 Mar 2025
8 May 2025
10-K
FY 2024
ended 31 Dec 2024
25 Feb 2025
10-Q
Q3
ended 30 Sept 2024
7 Nov 2024
10-Q
Q2
ended 30 Jun 2024
8 Aug 2024
10-Q
Q1
ended 31 Mar 2024
9 May 2024
10-K
FY 2023
ended 31 Dec 2023
27 Feb 2024
10-Q
Q3
ended 30 Sept 2023
8 Nov 2023
10-Q
Q2
ended 30 Jun 2023
4 Aug 2023
10-Q
Q1
ended 31 Mar 2023
5 May 2023
Events
(240)
Expand
8-K
Results of Operations and Financial Condition
4 Nov
8-K
Other Events
19 Oct
8-K
Results of Operations and Financial Condition
5 Aug
8-K
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
12 May
8-K
Results of Operations and Financial Condition
6 May
8-K
Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
6 Apr
8-K
Results of Operations and Financial Condition
17 Feb
8-K
MKS Announces Closing of Private Offering of โฌ1 Billion of 4.250% Senior Notes and Refinancing of Term Loan Facility
5 Feb
8-K
MKS Announces Proposed Private Offering of
28 Jan
8-K
Results of Operations and Financial Condition
21 Jan
8-K
Results of Operations and Financial Condition
5 Nov 2025
8-K
Results of Operations and Financial Condition
6 Aug 2025
8-K
Material Modification to Security Holders' Rights
15 May 2025
8-K
Results of Operations and Financial Condition
7 May 2025
8-K
Results of Operations and Financial Condition
12 Feb 2025
Insider Ownership
(1.7K)
Expand
Form 4
Lee John Tseng-Chung
3 Nov
Form 4
Mora Elizabeth
2 Sep
Form 4
Donlan Renee Martel
18 Aug
Form 4
Lee John Tseng-Chung
17 Aug
Form 4
Williams John Edward
4 Aug
Form 4
Schreiner James Alan
16 Jun
Form 4
Schreiner James Alan
11 Jun
Form 4
McCarthy Michelle M
8 Jun
Form 3
Donlan Renee Martel
4 Jun
Form 4
Henry David Philip
2 Jun
Form 4
Mora Elizabeth
2 Jun
Form 4
Donahue Joseph B
28 May
Form 4
COLELLA GERALD G
28 May
Form 4
Henry David Philip
27 May
Form 4
Mayampurath Ramakumar
26 May
Beneficial Ownership
(160)
Expand
SC 13G/A
MKS INC
10 Nov
SC 13G/A
MKS INC
3 Sep
SC 13G/A
MKS INC
24 Jul
SC 13G
MKS INC
16 Jul
SC 13G/A
MKS INC
6 May
SC 13G
MKS INC
30 Apr
SC 13G
MKS INC
29 Apr
SC 13G/A
MKS INC
27 Mar
SC 13G/A
MKS INC
17 Feb
SC 13G
MKS INC
12 Feb
SC 13G/A
MKS INC
31 Oct 2025
SC 13G/A
MKS INC
17 Oct 2025
SC 13G/A
MKS INC
14 Aug 2025
SC 13G
MKS INC
8 Aug 2025
SC 13G/A
MKS INC
8 Aug 2025
Other Ownership
(77)
Expand
Form 144
Lee John Tseng-Chung
13 Nov
Form 144
Mora Elizabeth
1 Sep
Form 144
Lee John Tseng-Chung
14 Aug
Form 144
Williams John Edward
3 Aug
Form 144
Schreiner James Alan
12 Jun
Form 144
Schreiner James Alan
10 Jun
Form 144
McCarthy Michelle M
5 Jun
Form 144
Henry David Philip
1 Jun
Form 144
Mora Elizabeth
1 Jun
Form 144
Donahue Joseph B
27 May
Form 144
COLELLA GERALD G
27 May
Form 144
Henry David Philip
26 May
Form 144
Lee John Tseng-Chung
22 May
Form 144
Mayampurath Ramakumar
22 May
Form 144
CANNONE PETER III
18 May
Proxies
(70)
Expand
ARS
Annual report to security holders
31 Mar
DEFA14A
Definitive additional materials
31 Mar
DEF 14A
Definitive proxy statement
31 Mar
PRE 14A
Preliminary proxy statement
20 Mar
DEFA14A
Definitive additional materials
1 Apr 2025
ARS
Annual report to security holders
1 Apr 2025
DEF 14A
Definitive proxy statement
1 Apr 2025
PRE 14A
Preliminary proxy statement
21 Mar 2025
DEFA14A
Definitive additional materials
27 Mar 2024
DEF 14A
Definitive proxy statement
27 Mar 2024
ARS
Annual report to security holders
27 Mar 2024
DEF 14A
Definitive proxy statement
5 Apr 2023
DEFA14A
Definitive additional materials
5 Apr 2023
ARS
Annual report to security holders
5 Apr 2023
DEF 14A
Definitive proxy statement
31 Mar 2022
Registrations
(54)
Expand
S-8
Registration statement (employee benefit plan)
11 May
POS AM
Post-effective amendment (unspecified)
21 Feb 2024
424B7
Prospectus filing (Rule 424(b)(7))
5 Jun 2023
424B7
Prospectus filing (Rule 424(b)(7))
1 Jun 2023
S-3ASR
Automatic shelf registration statement (S-3)
24 Aug 2022
S-8
Registration statement (employee benefit plan)
10 May 2022
Form 425
Business combination communication
8 Mar 2021
Form 425
Business combination communication
17 Feb 2021
Form 425
Business combination communication
16 Feb 2021
Form 425
Business combination communication
8 Feb 2021
S-8
Registration statement (employee benefit plan)
1 Feb 2019
S-8
Registration statement (employee benefit plan)
29 Apr 2016
S-8
Registration statement (employee benefit plan)
7 May 2014
S-8
MKS INSTRUMENTS, INC.
10 Aug 2009
S-8
MKS INSTRUMENTS, INC.
5 Aug 2005
Filing Review Correspondence
(5)
Expand
CORRESP
Filing review correspondence
28 Apr 2017
CORRESP
Filing review correspondence
19 Jun 2012
CORRESP
Filing review correspondence
30 Apr 2012
CORRESP
Filing review correspondence
24 Feb 2012
CORRESP
Filing review correspondence
18 Jan 2012
SEC Orders And Notices
(23)
Expand
EFFECT
Notice of effectiveness
29 Feb 2024
CT ORDER
Confidential treatment order
5 Jan 2017
CT ORDER
Confidential treatment order
5 Jan 2017
CT ORDER
Confidential treatment order
5 Jan 2017
CT ORDER
Confidential treatment order
18 Mar 2016
CT ORDER
Confidential treatment order
2 Sep 2015
CT ORDER
Confidential treatment order
2 Sep 2015
CT ORDER
Confidential treatment order
20 Mar 2015
CT ORDER
Confidential treatment order
19 Dec 2014
CT ORDER
Confidential treatment order
17 Sep 2014
CT ORDER
Confidential treatment order
9 Jun 2014
CT ORDER
Confidential treatment order
9 Jun 2014
CT ORDER
Confidential treatment order
9 Dec 2013
CT ORDER
Confidential treatment order
27 Mar 2013
CT ORDER
Confidential treatment order
18 Jan 2013
Tender Offers And Going Private
(6)
Expand
SC TO-I/A
Tender offer statement (issuer, amendment)
1 Sep 2009
SC TO-I/A
Tender offer statement (issuer, amendment)
28 Aug 2009
SC TO-I/A
MKS INSTRUMENTS, INC.
20 Aug 2009
SC TO-I/A
MKS INSTRUMENTS, INC.
17 Aug 2009
SC TO-I/A
MKS INSTRUMENTS, INC.
12 Aug 2009
SC TO-I
Tender offer statement (issuer)
3 Aug 2009
Other
(14)
Expand
SD
SD
28 May
SD
SD
29 May 2025
SD
SD
23 May 2024
SD
SD
25 May 2023
SD
SD
26 May 2022
SD
SD
27 May 2021
SD
SD
29 May 2020
SD
SD
30 May 2019
SD
SD
30 May 2018
SD
SD
30 May 2017
SD
SD
31 May 2016
SD
SD
1 Jun 2015
SD
SD
2 Jun 2014
10-K405
MKS INSTRUMENTS INC.
2 Apr 2001
Ask in Filing
Ask in Filing